Thirty years is a long time between Episodes VI and VII. The GFFA will have to completely rebuild its political systems and recover from a civil war, and the Jedi will have to find some way to continue. Now that all of this time is completely open, what are the possibilities for reestablishing the Jedi? Restoring order to the galaxy as a whole is a challenge enough, but the Jedi have been the protectors of justice and the Republic, and perhaps it just won’t be a new Republic without them.
In Heir to the Empire, Luke is reminded that he is “not the last of the old Jedi, but the first of the new.” Regardless of canonicity of this moment, this is a weighty charge. Giving one quickly-trained Jedi the responsibility of restoring the entire order is intimidating. So much Jedi history has been lost and destroyed to the point that Luke has literally no clue where to go from there, and there are no easy answers. In the Expanded Universe, Luke muddles through reestablishing the Jedi. Records appear, potential students come out of the woodwork, and it becomes clear that the Empire hasn’t been able to completely eradicate all non-Imperial Force-users. Some student succeed and become the teachers for the next generation, some fall to the dark side, some leave the order- just as the old Jedi order. Considering how little information Luke has to work with, it’s quite a miracle that the Jedi return and survive.

